CAN CSA-ISO IEC 14492B-2004 Information technology - Lossy lossless coding of bi-level images AMENDMENT 2 Extension of adaptive templates for halftone coding.pdf

上传人:ownview251 文档编号:590410 上传时间:2018-12-15 格式:PDF 页数:11 大小:212.96KB
下载 相关 举报
CAN CSA-ISO IEC 14492B-2004 Information technology - Lossy lossless coding of bi-level images AMENDMENT 2 Extension of adaptive templates for halftone coding.pdf_第1页
第1页 / 共11页
CAN CSA-ISO IEC 14492B-2004 Information technology - Lossy lossless coding of bi-level images AMENDMENT 2 Extension of adaptive templates for halftone coding.pdf_第2页
第2页 / 共11页
CAN CSA-ISO IEC 14492B-2004 Information technology - Lossy lossless coding of bi-level images AMENDMENT 2 Extension of adaptive templates for halftone coding.pdf_第3页
第3页 / 共11页
CAN CSA-ISO IEC 14492B-2004 Information technology - Lossy lossless coding of bi-level images AMENDMENT 2 Extension of adaptive templates for halftone coding.pdf_第4页
第4页 / 共11页
CAN CSA-ISO IEC 14492B-2004 Information technology - Lossy lossless coding of bi-level images AMENDMENT 2 Extension of adaptive templates for halftone coding.pdf_第5页
第5页 / 共11页
亲,该文档总共11页,到这儿已超出免费预览范围,如果喜欢就下载吧!
资源描述

1、 Reference numberISO/IEC 14492:2001/Amd.2:2003(E)ISO/IEC 2003Information technology Lossy/lossless coding of bi-level images AMENDMENT 2: Extension of adaptive templates for halftone coding Technologies de linformation Codage avec ou sans perte des images au trait AMENDEMENT 2: Extensions des modles

2、 adaptatifs pour le codage des demi-teintes Amendment 2:2004 toNational Standard of CanadaCAN/CSA-ISO/IEC 14492:04Amendment 2:2003 to International Standard ISO/IEC 14492:2001 has been adopted without modification(IDT) as Amendment 2:2004 to CAN/CSA-ISO/IEC 14492:04. This Amendment was reviewed by t

3、he CSATechnical Committee on Information Technology (TCIT) under the jurisdiction of the Strategic SteeringCommitte on Information Technology and deemed acceptable for use in Canada.December 2004ISO/IEC 14492:2001/Amd.2:2003(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordan

4、ce with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobes licen

5、sing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing

6、. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO/IEC 2003 All rights reserved. Unless otherwise specified, no part of this

7、publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211

8、Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org ii ISO/IEC 2003 All rights reservedISO/IEC 14492:2001/Amd.2:2003(E) ISO/IEC 2003 All rights reserved iiiForeword ISO (the International Organization for Standardization) and IEC (the International Electrot

9、echnical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the development of International Standards through technical committees established by the respective organization to deal with particular fields of technical

10、 activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work. In the field of information technology, ISO and IEC have established a joint technical

11、committee, ISO/IEC JTC 1. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of the joint technical committee is to prepare International Standards. Draft International Standards adopted by the joint technical committee are circula

12、ted to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO and IEC shall not be held re

13、sponsible for identifying any or all such patent rights. Amendment 2 to ISO/IEC 14492:2001 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information, in collaboration with ITU-T. The identical

14、text is published as ITU-T Rec. T.88 (2000)/Amd.2(06/2003). ISO/IEC 14492:2001/Amd.2:2003 (E) ITU-T Rec. T.88 (2000)/Amd.2 (06/2003) 1 INTERNATIONAL STANDARD ITU-T RECOMMENDATION Information technology Lossy/lossless coding of bi-level images Amendment 2 Extension of adaptive templates for halftone

15、coding 1) Subclause 4.2 a) Eight symbols for additional adaptive template pixels (from A5to A12) are added after A4as follows (with the additions underlined): A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12Adaptive template pixels in the generic region decoding procedure b) A new symbol “EXTTEMPLA

16、TE“ is inserted after the symbol “EXRUNLENGTH“ as follows (with the additions underlined): EXRUNLENGTH The length of a run of identical export flag values EXTTEMPLATE A parameter indicating whether extended reference template is used in a generic region decoding procedure c) New 16 symbols “GBATXi“

17、and “GBATYi“ (i=5,.,12) are inserted after “GBATY4“ as follows (with the additions underlined): GBATY4The Y location of adaptive template pixel 4 in a generic region decoding procedure GBATX5 The X location of adaptive template pixel 5 in a generic region decoding procedure GBATY5 The Y location of

18、adaptive template pixel 5 in a generic region decoding procedure GBATX6 The X location of adaptive template pixel 6 in a generic region decoding procedure GBATY6 The Y location of adaptive template pixel 6 in a generic region decoding procedure GBATX7 The X location of adaptive template pixel 7 in a

19、 generic region decoding procedure GBATY7 The Y location of adaptive template pixel 7 in a generic region decoding procedure GBATX8 The X location of adaptive template pixel 8 in a generic region decoding procedure GBATY8 The Y location of adaptive template pixel 8 in a generic region decoding proce

20、dure GBATX9 The X location of adaptive template pixel 9 in a generic region decoding procedure GBATY9 The Y location of adaptive template pixel 9 in a generic region decoding procedure GBATX10 The X location of adaptive template pixel 10 in a generic region decoding procedure GBATY10 The Y location

21、of adaptive template pixel 10 in a generic region decoding procedure GBATX11 The X location of adaptive template pixel 11 in a generic region decoding procedure GBATY11 The Y location of adaptive template pixel 11 in a generic region decoding procedure GBATX12 The X location of adaptive template pix

22、el 12 in a generic region decoding procedure GBATY12 The Y location of adaptive template pixel 12 in a generic region decoding procedure ISO/IEC 14492:2001/Amd.2:2003 (E) 2 ITU-T Rec. T.88 (2000)/Amd.2 (06/2003) 2) Subclause 6.2.2 In Table 2, new symbols “EXTTEMPLATE“, “GBATXi“ and “GBATYi“ (i=5,.,1

23、2) are inserted, and the notes of the table are revised as follows (with the additions and revisions underlined): Table 2 Parameters for the generic region decoding procedure Name Type Size (bits) Signed? Description and restrictions (Leave untouched) TPGDON Integer 1 N Whether typical prediction is

24、 used. a)EXTTEMPLATE Integer 1 N Whether extended reference template is used. e) (Leave untouched) GBATY4Integer 8 Y The Y location of the adaptive template pixel A4. b)GBATX5 Integer 8 Y The X location of the adaptive template pixel A5. d)GBATY5 Integer 8 Y The Y location of the adaptive template p

25、ixel A5. d)GBATX6 Integer 8 Y The X location of the adaptive template pixel A6. d)GBATY6 Integer 8 Y The Y location of the adaptive template pixel A6. d)GBATX7 Integer 8 Y The X location of the adaptive template pixel A7. d)GBATY7 Integer 8 Y The Y location of the adaptive template pixel A7. d)GBATX

26、8 Integer 8 Y The X location of the adaptive template pixel A8. d)GBATY8 Integer 8 Y The Y location of the adaptive template pixel A8. d)GBATX9 Integer 8 Y The X location of the adaptive template pixel A9. d)GBATY9 Integer 8 Y The Y location of the adaptive template pixel A9. d)GBATX10 Integer 8 Y T

27、he X location of the adaptive template pixel A10. d)GBATY10 Integer 8 Y The Y location of the adaptive template pixel A10. d)GBATX11 Integer 8 Y The X location of the adaptive template pixel A11. d)GBATY11 Integer 8 Y The Y location of the adaptive template pixel A11. d)GBATX12 Integer 8 Y The X loc

28、ation of the adaptive template pixel A12. d)GBATY12 Integer 8 Y The Y location of the adaptive template pixel A12. d)a)Unused if MMR = 1 b)Unused if MMR = 1 or GBTEMPLATE 0 c)Unused if USESKIP = 0 or MMR = 1 d)Used only if MMR = 0 and GBTEMPLATE = 0 and EXTTEMPLATE = 1 e)Used only if MMR = 0 and GBT

29、EMPLATE = 0 3) Subclause 6.2.5.3 a) The identification number of Figure 3 is changed to “Figure 3(a)“, and its caption is revised (with the additions and revisions underlined): X A4 XXXA3 A2 XXX X XA1 XXXFigure 3(a) Template when GBTEMPLATE = 0 and EXTTEMPLATE = 0, showing the AT pixels at their nom

30、inal locations ISO/IEC 14492:2001/Amd.2:2003 (E) ITU-T Rec. T.88 (2000)/Amd.2 (06/2003) 3 b) New Figure 3(b) is inserted as follows: X A11 A4 A2 A5 A9 A12 A3 X X X A6 A10A8 A7 A1 Figure 3(b) Template when GBTEMPLATE = 0 and EXTTEMPLATE = 1, showing the AT pixels at their nominal locations c) The sec

31、ond paragraph in subclause 6.2.5.3 is revised as follows (with the additions and revisions underlined): Figure 3(a) shows the template which shall be used when GBTEMPLATE is 0 and EXTTEMPLATE is 0. Figure 3(b) shows the template which shall be used when GBTEMPLATE is 0 and EXTTEMPLATE is 1. Figure 4

32、 shows the template which shall be used when GBTEMPLATE is 1. Figure 5 shows the template which shall be used when GBTEMPLATE is 2. Figure 6 shows the template which shall be used when GBTEMPLATE is 3. In each of these figures, the pixel denoted by a circle corresponds to the pixel to be coded and i

33、s not part of the template. The pixels denoted by X correspond to ordinary pixels in the template. The pixels denoted A1-A12are special pixels in the template. They are denoted “adaptive“ or AT pixels. These pixels are special in that their locations are not fixed, but can be placed at different loc

34、ations. See 6.2.5.4 for a description of AT pixels. The legends A1-A12indicate the AT pixels 1 to 12. The pixels actual locations are specified as parameters to this decoding procedure; Figures 3-6 show the nominal locations of these AT pixels for each template. 4) Subclause 6.2.5.4 a) The second pa

35、ragraph is revised as follows (with the additions and revisions underlined): The pixels that are allowed to change are called AT pixels. Their nominal locations are indicated by A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, and A12 in Figures 3(a), 3(b), 4, 5 and 6. Note that some templates have few

36、er than sixteen AT pixels. In general, an AT pixel can be located anywhere in the field shown in Figure 7, not including the current pixel. Hence, there is the possibility to use an effective template size of 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, or 4 pixels by having the moved location of the AT p

37、ixel overlap a regular template pixel. The actual locations of the AT pixels for any invocation of this decoding procedure are specified as parameters to the decoding procedure. The location of the pixel A1is given by (GBATX1, GBATY1). If GBTEMPLATE is 0, then: the location of the pixel A2is given b

38、y (GBATX2, GBATY2); the location of the pixel A3is given by (GBATX3, GBATY3); and the location of the pixel A4is given by (GBATX4, GBATY4). Additionally, if GBTEMPLATE is 0 and EXTTEMPLATE is 1, then: the location of the pixel A5is given by (GBATX5, GBATY5); the location of the pixel A6is given by (

39、GBATX6, GBATY6); the location of the pixel A7is given by (GBATX7, GBATY7); the location of the pixel A8is given by (GBATX8, GBATY8); the location of the pixel A9is given by (GBATX9, GBATY9); the location of the pixel A10is given by (GBATX10, GBATY10); the location of the pixel A11is given by (GBATX1

40、1, GBATY11); the location of the pixel A12is given by (GBATX12, GBATY12). b) Note 2 is revised as follows (with the additions and revisions underlined): NOTE 2 The indices of the AT pixels in Figures 3(a) and 3(b) correspond to the expected goodness. If moving only one AT pixel from the nominal loca

41、tion shown in Figure 3(a), it is advisable to move A4. The next pixel to move is A 3 and so on. ISO/IEC 14492:2001/Amd.2:2003 (E) 4 ITU-T Rec. T.88 (2000)/Amd.2 (06/2003) c) Table 5 is revised as follows (with the additions and revisions underlined): Table 5 The nominal values of the AT pixel locati

42、ons GBTEMPLATE 0 0 1 2 3 EXTTEMPLATE 1 0 0 0 0 GBATX1GBATY12 0 3 1 3 1 2 1 2 1 GBATX2GBATY20 2 3 1 NA NA NA NA NA NA GBATX3GBATY32 1 2 2 NA NA NA NA NA NA GBATX4GBATY41 2 2 2 NA NA NA NA NA NA GBATX5 GBATY5 1 2 NA NA NA NA NA NA NA NA GBATX6 GBATY6 2 1 NA NA NA NA NA NA NA NA GBATX7 GBATY7 3 0 NA NA

43、 NA NA NA NA NA NA GBATX8 GBATY8 4 0 NA NA NA NA NA NA NA NA GBATX9 GBATY9 2 2 NA NA NA NA NA NA NA NA GBATX10 GBATY10 3 1 NA NA NA NA NA NA NA NA GBATX11 GBATY11 2 2 NA NA NA NA NA NA NA NA GBATX12 GBATY12 3 1 NA NA NA NA NA NA NA NA NOTE NA means that the parameter has no nominal value. 5) Subclau

44、se 6.2.5.7 The step d) ii) is changed as follows (with the additions and revisions underlined): d) If LTP = 0 then, from left to right, decode each pixel of the current row of GBREG. The procedure for each pixel is as follows: i) If USESKIP is 1 and the pixel in the bitmap SKIP at the location corre

45、sponding to the current pixel is 1, then set the current pixel to 0. ii) Otherwise: Place the template given by parameters GBTEMPLATE, GBATX1through GBATX12 and GBATY1through GBATY12 so that the current pixel is aligned with the location denoted by a circle in the figure describing the appearance of

46、 the template with identifier GBTEMPLATE. 6) Subclause 7.4.6.2 a) Figure 46 is replaced by the following figure: EXTTEMPLATE Reserved Must be 0 TPGDON GBTEMPLATE MMR 7 6 5 4 3 2 1 0 Figure 46 Generic region segment flags field structure 7) Subclause 7.4.6.2 The notations of Bit 4 are added for EXTTE

47、MPLATE, and reserved bits are changed to Bits 5-7 as follows (with the additions and revisions underlined): Bit 4 EXTTEMPLATE This field specifies whether extended reference template is used. Bits 5-7 Reserved; must be zero. ISO/IEC 14492:2001/Amd.2:2003 (E) ITU-T Rec. T.88 (2000)/Amd.2 (06/2003) 5

48、8) Subclause 7.4.6.3 a) The first paragraph is changed as follows (with the additions and revisions underlined): This field is only present if MMR is 0. If GBTEMPLATE is 0 and EXTTEMPLATE is 0, it is an eight-byte field, formatted as shown in Figure 47(a) and as described below. b) The identificatio

49、n number of Figure 47 is changed to Figure 47(a) as follows (with the revision underlined): GBATX1 GBATY1 GBATX2 GBATY2 GBATX3 GBATY3 GBATX4 GBATY4 Figure 47(a) Generic region AT flags field structure when GBTEMPLATE is 0 and EXTTEMPLATE is 0 c) New Figure 47(b) is inserted immediately after as follows: GBATX1GBATY1GBATX2GBATX12GBATY2GBATY12T.88Amd.2_F47(b)Figure 47(b) Generic region AT flags field structure when GBTEMPLATE is 0 and EXTTEMPLATE

展开阅读全文
相关资源
猜你喜欢
  • BS EN 1186-10-2002 Materials and articles in contact with foodstuffs - Plastics - Test methods for overall migration into olive oil (modified method for use in cases where incomple.pdf BS EN 1186-10-2002 Materials and articles in contact with foodstuffs - Plastics - Test methods for overall migration into olive oil (modified method for use in cases where incomple.pdf
  • BS EN 1186-11-2002 Materials and articles in contact with foodstuffs - Plastics - Test methods for overall migration into mixtures of C-labelled synthetic triglycerides《与食品接触的材料和器具.pdf BS EN 1186-11-2002 Materials and articles in contact with foodstuffs - Plastics - Test methods for overall migration into mixtures of C-labelled synthetic triglycerides《与食品接触的材料和器具.pdf
  • BS EN 1186-12-2002 Materials and articles in contact with foodstuffs - Plastics - Test methods for overall migration at low temperatures《与食品接触的材料和器具 塑料 低温下的全迁移量的试验方法》.pdf BS EN 1186-12-2002 Materials and articles in contact with foodstuffs - Plastics - Test methods for overall migration at low temperatures《与食品接触的材料和器具 塑料 低温下的全迁移量的试验方法》.pdf
  • BS EN 1186-13-2002 Materials and articles in contact with foodstuffs - Plastics - Test methods for overall migration at high temperatures《与食品接触的材料和制品 塑料 高温下全渗移物析出量的试验方法》.pdf BS EN 1186-13-2002 Materials and articles in contact with foodstuffs - Plastics - Test methods for overall migration at high temperatures《与食品接触的材料和制品 塑料 高温下全渗移物析出量的试验方法》.pdf
  • BS EN 1186-14-2002 Materials and articles in contact with foodstuffs - Plastics - Test methods for substitute tests for overall migration from plastics intended to come into contac.pdf BS EN 1186-14-2002 Materials and articles in contact with foodstuffs - Plastics - Test methods for substitute tests for overall migration from plastics intended to come into contac.pdf
  • BS EN 1186-15-2002 Materials and articles in contact with foodstuffs - Plastics - Alternative test methods to migration into fatty food simulants by rapid extraction into iso-octan.pdf BS EN 1186-15-2002 Materials and articles in contact with foodstuffs - Plastics - Alternative test methods to migration into fatty food simulants by rapid extraction into iso-octan.pdf
  • BS EN 1186-2-2002 Materials and articles in contact with foodstuffs - Plastics - Test methods for overall migration into olive oil by total immersion《与食品接触的材料和器具 塑料 整体浸没于橄榄油中的全迁移量的.pdf BS EN 1186-2-2002 Materials and articles in contact with foodstuffs - Plastics - Test methods for overall migration into olive oil by total immersion《与食品接触的材料和器具 塑料 整体浸没于橄榄油中的全迁移量的.pdf
  • BS EN 1186-3-2002 Materials and articles in contact with foodstuffs - Plastics - Test methods for overall migration into aqueous food simulants by total immersion《与食品接触的材料和器具 塑料 整体.pdf BS EN 1186-3-2002 Materials and articles in contact with foodstuffs - Plastics - Test methods for overall migration into aqueous food simulants by total immersion《与食品接触的材料和器具 塑料 整体.pdf
  • BS EN 1186-4-2002 Materials and articles in contact with foodstuffs - Plastics - Test methods for overall migration into olive oil by cell《与食品接触的材料和器具 塑料 用电解槽浸渍在橄榄油中的全迁移量的试验方法》.pdf BS EN 1186-4-2002 Materials and articles in contact with foodstuffs - Plastics - Test methods for overall migration into olive oil by cell《与食品接触的材料和器具 塑料 用电解槽浸渍在橄榄油中的全迁移量的试验方法》.pdf
  • 相关搜索

    当前位置:首页 > 标准规范 > 国际标准 > 其他

    copyright@ 2008-2019 麦多课文库(www.mydoc123.com)网站版权所有
    备案/许可证编号:苏ICP备17064731号-1